2 * Copyright (C) 2002 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
3 * Licensed under the GPL
11 #include <sys/ioctl.h>
12 #include <sys/mount.h>
13 #include <sys/socket.h>
15 #include <sys/sysmacros.h>
17 #include <sys/types.h>
20 static void copy_stat(struct uml_stat *dst, const struct stat64 *src)
22 *dst = ((struct uml_stat) {
23 .ust_dev = src->st_dev, /* device */
24 .ust_ino = src->st_ino, /* inode */
25 .ust_mode = src->st_mode, /* protection */
26 .ust_nlink = src->st_nlink, /* number of hard links */
27 .ust_uid = src->st_uid, /* user ID of owner */
28 .ust_gid = src->st_gid, /* group ID of owner */
29 .ust_size = src->st_size, /* total size, in bytes */
30 .ust_blksize = src->st_blksize, /* blocksize for filesys I/O */
31 .ust_blocks = src->st_blocks, /* number of blocks allocated */
32 .ust_atime = src->st_atime, /* time of last access */
33 .ust_mtime = src->st_mtime, /* time of last modification */
34 .ust_ctime = src->st_ctime, /* time of last change */
38 int os_stat_fd(const int fd, struct uml_stat *ubuf)
43 CATCH_EINTR(err = fstat64(fd, &sbuf));
48 copy_stat(ubuf, &sbuf);
52 int os_stat_file(const char *file_name, struct uml_stat *ubuf)
57 CATCH_EINTR(err = stat64(file_name, &sbuf));
62 copy_stat(ubuf, &sbuf);
66 int os_access(const char *file, int mode)
70 amode = (mode & OS_ACC_R_OK ? R_OK : 0) |
71 (mode & OS_ACC_W_OK ? W_OK : 0) |
72 (mode & OS_ACC_X_OK ? X_OK : 0) |
73 (mode & OS_ACC_F_OK ? F_OK : 0);
75 err = access(file, amode);
82 /* FIXME? required only by hostaudio (because it passes ioctls verbatim) */
83 int os_ioctl_generic(int fd, unsigned int cmd, unsigned long arg)
87 err = ioctl(fd, cmd, arg);
94 /* FIXME: ensure namebuf in os_get_if_name is big enough */
95 int os_get_ifname(int fd, char* namebuf)
97 if (ioctl(fd, SIOCGIFNAME, namebuf) < 0)
103 int os_set_slip(int fd)
108 if (ioctl(fd, TIOCSETD, &disc) < 0)
112 if (ioctl(fd, SIOCSIFENCAP, &sencap) < 0)
118 int os_mode_fd(int fd, int mode)
122 CATCH_EINTR(err = fchmod(fd, mode));
129 int os_file_type(char *file)
134 err = os_stat_file(file, &buf);
138 if (S_ISDIR(buf.ust_mode))
140 else if (S_ISLNK(buf.ust_mode))
141 return OS_TYPE_SYMLINK;
142 else if (S_ISCHR(buf.ust_mode))
143 return OS_TYPE_CHARDEV;
144 else if (S_ISBLK(buf.ust_mode))
145 return OS_TYPE_BLOCKDEV;
146 else if (S_ISFIFO(buf.ust_mode))
148 else if (S_ISSOCK(buf.ust_mode))
150 else return OS_TYPE_FILE;
153 int os_file_mode(const char *file, struct openflags *mode_out)
157 *mode_out = OPENFLAGS();
159 err = access(file, W_OK);
160 if (err && (errno != EACCES))
163 *mode_out = of_write(*mode_out);
165 err = access(file, R_OK);
166 if (err && (errno != EACCES))
169 *mode_out = of_read(*mode_out);
174 int os_open_file(const char *file, struct openflags flags, int mode)
178 if (flags.r && flags.w)
197 fd = open64(file, f, mode);
201 if (flags.cl && fcntl(fd, F_SETFD, 1)) {
210 int os_connect_socket(const char *name)
212 struct sockaddr_un sock;
215 sock.sun_family = AF_UNIX;
216 snprintf(sock.sun_path, sizeof(sock.sun_path), "%s", name);
218 fd = socket(AF_UNIX, SOCK_STREAM, 0);
224 err = connect(fd, (struct sockaddr *) &sock, sizeof(sock));
238 void os_close_file(int fd)
242 int os_fsync_file(int fd)
249 int os_seek_file(int fd, unsigned long long offset)
251 unsigned long long actual;
253 actual = lseek64(fd, offset, SEEK_SET);
254 if (actual != offset)
259 int os_read_file(int fd, void *buf, int len)
261 int n = read(fd, buf, len);
268 int os_write_file(int fd, const void *buf, int len)
270 int n = write(fd, (void *) buf, len);
277 int os_sync_file(int fd)
286 int os_file_size(const char *file, unsigned long long *size_out)
291 err = os_stat_file(file, &buf);
293 printk(UM_KERN_ERR "Couldn't stat \"%s\" : err = %d\n", file,
298 if (S_ISBLK(buf.ust_mode)) {
302 fd = open(file, O_RDONLY, 0);
305 printk(UM_KERN_ERR "Couldn't open \"%s\", "
306 "errno = %d\n", file, errno);
309 if (ioctl(fd, BLKGETSIZE, &blocks) < 0) {
311 printk(UM_KERN_ERR "Couldn't get the block size of "
312 "\"%s\", errno = %d\n", file, errno);
316 *size_out = ((long long) blocks) * 512;
319 else *size_out = buf.ust_size;
324 int os_file_modtime(const char *file, unsigned long *modtime)
329 err = os_stat_file(file, &buf);
331 printk(UM_KERN_ERR "Couldn't stat \"%s\" : err = %d\n", file,
336 *modtime = buf.ust_mtime;
340 int os_set_exec_close(int fd)
344 CATCH_EINTR(err = fcntl(fd, F_SETFD, FD_CLOEXEC));
351 int os_pipe(int *fds, int stream, int close_on_exec)
353 int err, type = stream ? SOCK_STREAM : SOCK_DGRAM;
355 err = socketpair(AF_UNIX, type, 0, fds);
362 err = os_set_exec_close(fds[0]);
366 err = os_set_exec_close(fds[1]);
373 printk(UM_KERN_ERR "os_pipe : Setting FD_CLOEXEC failed, err = %d\n",
380 int os_set_fd_async(int fd)
384 flags = fcntl(fd, F_GETFL);
388 flags |= O_ASYNC | O_NONBLOCK;
389 if (fcntl(fd, F_SETFL, flags) < 0) {
391 printk(UM_KERN_ERR "os_set_fd_async : failed to set O_ASYNC "
392 "and O_NONBLOCK on fd # %d, errno = %d\n", fd, errno);
396 if ((fcntl(fd, F_SETSIG, SIGIO) < 0) ||
397 (fcntl(fd, F_SETOWN, os_getpid()) < 0)) {
399 printk(UM_KERN_ERR "os_set_fd_async : Failed to fcntl F_SETOWN "
400 "(or F_SETSIG) fd %d, errno = %d\n", fd, errno);
407 int os_clear_fd_async(int fd)
411 flags = fcntl(fd, F_GETFL);
415 flags &= ~(O_ASYNC | O_NONBLOCK);
416 if (fcntl(fd, F_SETFL, flags) < 0)
421 int os_set_fd_block(int fd, int blocking)
425 flags = fcntl(fd, F_GETFL);
430 flags &= ~O_NONBLOCK;
434 if (fcntl(fd, F_SETFL, flags) < 0)
440 int os_accept_connection(int fd)
444 new = accept(fd, NULL, 0);
462 int os_shutdown_socket(int fd, int r, int w)
475 err = shutdown(fd, what);
481 int os_rcv_fd(int fd, int *helper_pid_out)
484 char buf[CMSG_SPACE(sizeof(new))];
486 struct cmsghdr *cmsg;
491 iov = ((struct iovec) { .iov_base = helper_pid_out,
492 .iov_len = sizeof(*helper_pid_out) });
495 msg.msg_control = buf;
496 msg.msg_controllen = sizeof(buf);
499 n = recvmsg(fd, &msg, 0);
502 else if (n != iov.iov_len)
503 *helper_pid_out = -1;
505 cmsg = CMSG_FIRSTHDR(&msg);
507 printk(UM_KERN_ERR "rcv_fd didn't receive anything, "
508 "error = %d\n", errno);
511 if ((cmsg->cmsg_level != SOL_SOCKET) ||
512 (cmsg->cmsg_type != SCM_RIGHTS)) {
513 printk(UM_KERN_ERR "rcv_fd didn't receive a descriptor\n");
517 new = ((int *) CMSG_DATA(cmsg))[0];
521 int os_create_unix_socket(const char *file, int len, int close_on_exec)
523 struct sockaddr_un addr;
526 sock = socket(PF_UNIX, SOCK_DGRAM, 0);
531 err = os_set_exec_close(sock);
533 printk(UM_KERN_ERR "create_unix_socket : "
534 "close_on_exec failed, err = %d", -err);
537 addr.sun_family = AF_UNIX;
539 snprintf(addr.sun_path, len, "%s", file);
541 err = bind(sock, (struct sockaddr *) &addr, sizeof(addr));
548 void os_flush_stdout(void)
553 int os_lock_file(int fd, int excl)
555 int type = excl ? F_WRLCK : F_RDLCK;
556 struct flock lock = ((struct flock) { .l_type = type,
557 .l_whence = SEEK_SET,
562 err = fcntl(fd, F_SETLK, &lock);
567 err = fcntl(fd, F_GETLK, &lock);
573 printk(UM_KERN_ERR "F_SETLK failed, file already locked by pid %d\n",
580 unsigned os_major(unsigned long long dev)
585 unsigned os_minor(unsigned long long dev)
590 unsigned long long os_makedev(unsigned major, unsigned minor)
592 return makedev(major, minor);